Issued Patents All Time
Showing 26–50 of 83 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D492958 | Image forming apparatus | Toru Oguma, Akiyoshi Yokoi, Noriyuki Komatsu | 2004-07-13 |
| 6738589 | Process cartridge including convex and concave portions and electrophotographic image forming apparatus to which such a process cartridge is detachably mountable | Kazushi Watanabe | 2004-05-18 |
| 6704525 | Developing device, process cartridge and electrophotographic image forming apparatus | Toru Oguma, Kazushi Watanabe, Akiyoshi Yokoi | 2004-03-09 |
| 6701107 | Memory member, unit, process cartridge and electrophotographic image forming apparatus | Kazushi Watanabe, Yoshihiro Ito | 2004-03-02 |
| 6697578 | Memory member, unit, process cartridge and electrophotographic image forming apparatus | Kazushi Watanabe, Yoshihiro Ito | 2004-02-24 |
| 6658224 | Process cartridge and electrophotographic image forming apparatus | Akiyoshi Yokoi, Kazushi Watanabe, Toru Oguma | 2003-12-02 |
| 6654567 | Process cartridge detachable from electrophotographic image forming apparatus having wireless communication | Kazushi Watanabe, Yoshihiro Ito | 2003-11-25 |
| 6625413 | Developing device, process cartridge and electrophotographic image forming apparatus | Toru Oguma, Kazushi Watanabe, Akiyoshi Yokoi | 2003-09-23 |
| D478615 | Image forming apparatus | Toru Oguma, Akiyoshi Yokoi, Noriyuki Komatsu | 2003-08-19 |
| 6594454 | Electric contact member and developing device, process cartridge, and electrophotographic image-forming apparatus using the electric contact member | Toru Oguma, Kazushi Watanabe | 2003-07-15 |
| 6463223 | Electrophotographic image forming apparatus, process cartridge developing device, developer supply container and measuring part therefor | Shirou Sakata, Hideki Matsumoto, Akiyoshi Yokoi | 2002-10-08 |
| 6408143 | Electrophotographic image forming apparatus | Kazushige Sakurai, Kazushi Watanabe, Hideki Matsumoto | 2002-06-18 |
| 6408142 | Process cartridge and image forming apparatus | Makoto Takeuchi, Masahiko Yashiro, Atsushi Numagami | 2002-06-18 |
| 6397018 | Developer amount detecting method, developing device, process cartridge and electrophotographic image forming apparatus | Hideki Matsumoto, Kazushige Sakurai, Isao Ikemoto, Kazushi Watanabe | 2002-05-28 |
| 6397017 | Developer amount detecting method, developing device, process cartridge and electrophotographic image forming apparatus | Hiroaki Sakai, Kazushi Watanabe, Masaru Shimura, Hideki Matsumoto, Seiji Saito | 2002-05-28 |
| 6330402 | Developer amount indicating method, electrophotographic image forming apparatus and process cartridge | Kazushige Sakurai, Isao Ikemoto, Kazushi Watanabe, Hideki Matsumoto | 2001-12-11 |
| 6308028 | Process cartridge having a particular electrical contact arrangement and image forming apparatus using such a process cartridge | Masahiko Yashiro, Atsushi Numagami | 2001-10-23 |
| 6266500 | Developing apparatus and process cartridge | Atsushi Numagami, Toru Oguma | 2001-07-24 |
| 6253036 | Electrophotographic image forming apparatus, process cartridge, developing device and measuring part | Shirou Sakata, Hideki Matsumoto, Akiyoshi Yokoi | 2001-06-26 |
| 6185393 | Developing apparatus, magnetic seal mounting method and process cartridge | Atsushi Numagami | 2001-02-06 |
| 6160976 | Developing device having magnetic seals | Isao Ikemoto, Kazushi Watanabe | 2000-12-12 |
| 6118961 | Detachable two-frame process cartridge for an image forming apparatus | Yoshiya Nomura, Tadayuki Tsuda, Shinichi Sasaki, Isao Ikemoto, Kazushi Watanabe +1 more | 2000-09-12 |
| 6101354 | Electrophotographic image forming apparatus to which a process cartridge is detachably mountable and such a process cartridge whose developing member is supported at a position which deviates from a developing position | Takao Nakagawa, Kazushi Watanabe, Atsushi Numagami, Katsunori Yokoyama | 2000-08-08 |
| 6070028 | Process cartridge, electrophotographic image forming apparatus and coupling therebetween | Kazuyoshi Odagawa, Shinichi Sasaki, Isao Ikemoto, Kazushi Watanabe | 2000-05-30 |
| 6064842 | Process cartridge having a conductive member for use in detecting presence of the process cartridge, and image forming apparatus for using such a process cartridge | Makoto Takeuchi, Masahiko Yashiro, Atsushi Numagami | 2000-05-16 |